Planning
4
Detection distance and reflector selection
40
Building Technologies
007016_i_en_--
Fire Safety
2012-09-07
4.5
Detection distance and reflector selection
The detection distance between the detector and reflector is 5 to 100 m. Select the
reflectors depending on the detection distance.
The table below shows guidelines for the type and number of reflectors depending
on the detection distance.
Detection distance
Type and number of reflectors
5 … 10 m
1 reflector for short distance (foil) DLR1193
+ filter for short distance DLF1191
10 … 30 m
1 reflector for short distance (foil) DLR1193
30 … 50 m
1 reflector for middle distance (foil)
DLR1192
50 … 65 m
4 reflectors for middle distance (foil)
DLR1192
20 … 100 m
1 reflector for long distance (prism)
DLR1191
Type and number of reflectors depending on the detection distance
If you are using more than one reflector, always position them close together and in
a square shape. The detection distance details are guidelines. They depend on
detector and reflector tolerances and may vary by a few meters. It is important that
a sufficiently high signal intensity is reached.
If there is a danger of moisture condensation, always use the reflector for long
distance and the built-in heating unit, even for short distances. You may not use
the reflectors for middle distance and short distance if there is a danger of moisture
condensation.
See also
